How to set an object null if all of its fields are null?
How to set an object null if all of its fields are null?
De-serializing
Gson gson = new Gson();
DetailUser detailUser = gson.fromJson(json, DetailUser.class);
DetailUser where disconnect should be null if all of its fields are null
public class DetailUser {
String email;
Integer age;
Disconnect disconnect;
}
Disconnect
public class Disconnect {
String text;
String beginning;
String end;
}
JSON by which disconnect should be null
{
"email":"test@test.test",
"age":33,
"disconnect":{}
}
JSON by which disconnect should not be null
{
"email":"test@test.test",
"age":33,
"disconnect":{
"text":"test",
"beginning":"test",
"end":"test"
}
}
I expect detailUser.getDisconnect()==null to be true but get false when Disconnect fields (text, beginning, end) are all null.
json gson deserialization json-deserialization
edited Dec 27 at 16:08
pirho
3,716101830
asked Dec 27 at 14:08
mario
256
add a comment |
How to set an object null if all of its fields are null?
De-serializing
Gson gson = new Gson();
DetailUser detailUser = gson.fromJson(json, DetailUser.class);
DetailUser where disconnect should be null if all of its fields are null
public class DetailUser {
String email;
Integer age;
Disconnect disconnect;
}
Disconnect
public class Disconnect {
String text;
String beginning;
String end;
}
JSON by which disconnect should be null
{
"email":"test@test.test",
"age":33,
"disconnect":{}
}
JSON by which disconnect should not be null
{
"email":"test@test.test",
"age":33,
"disconnect":{
"text":"test",
"beginning":"test",
"end":"test"
}
}
I expect detailUser.getDisconnect()==null to be true but get false when Disconnect fields (text, beginning, end) are all null.
json gson deserialization json-deserialization
edited Dec 27 at 16:08
pirho
3,716101830
asked Dec 27 at 14:08
mario
256
add a comment |
How to set an object null if all of its fields are null?
De-serializing
Gson gson = new Gson();
DetailUser detailUser = gson.fromJson(json, DetailUser.class);
DetailUser where disconnect should be null if all of its fields are null
public class DetailUser {
String email;
Integer age;
Disconnect disconnect;
}
Disconnect
public class Disconnect {
String text;
String beginning;
String end;
}
JSON by which disconnect should be null
{
"email":"test@test.test",
"age":33,
"disconnect":{}
}
JSON by which disconnect should not be null
{
"email":"test@test.test",
"age":33,
"disconnect":{
"text":"test",
"beginning":"test",
"end":"test"
}
}
I expect detailUser.getDisconnect()==null to be true but get false when Disconnect fields (text, beginning, end) are all null.
json gson deserialization json-deserialization
edited Dec 27 at 16:08
pirho
3,716101830
asked Dec 27 at 14:08
mario
256
How to set an object null if all of its fields are null?
De-serializing
Gson gson = new Gson();
DetailUser detailUser = gson.fromJson(json, DetailUser.class);
DetailUser where disconnect should be null if all of its fields are null
public class DetailUser {
String email;
Integer age;
Disconnect disconnect;
}
Disconnect
public class Disconnect {
String text;
String beginning;
String end;
}
JSON by which disconnect should be null
{
"email":"test@test.test",
"age":33,
"disconnect":{}
}
JSON by which disconnect should not be null
{
"email":"test@test.test",
"age":33,
"disconnect":{
"text":"test",
"beginning":"test",
"end":"test"
}
}
I expect detailUser.getDisconnect()==null to be true but get false when Disconnect fields (text, beginning, end) are all null.
json gson deserialization json-deserialization
json gson deserialization json-deserialization
edited Dec 27 at 16:08
pirho
3,716101830
asked Dec 27 at 14:08
mario
256
edited Dec 27 at 16:08
pirho
3,716101830
asked Dec 27 at 14:08
mario
256
edited Dec 27 at 16:08
pirho
3,716101830
edited Dec 27 at 16:08
pirho
3,716101830
edited Dec 27 at 16:08
pirho
3,716101830
3,716101830
asked Dec 27 at 14:08
mario
256
asked Dec 27 at 14:08
mario
256
asked Dec 27 at 14:08
mario
256
256
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Your problem is that there is a Disconnect object in your json that has all its fields null. Gson is working as it should but if you want to have Disconnect to be null whenever its all fields are null you have some options.
One option is to create custom JsonDeserializer, like:
public class NullAdapter implements JsonDeserializer<Disconnect> {
@Override
public Disconnect deserialize(JsonElement json, Type typeOfT,
JsonDeserializationContext context)
throws JsonParseException {
Disconnect dc = new Gson().fromJson(json, typeOfT);
// Here you decide the criteria in which case to return the Disconnect or null
// I decided that if any of its fields is not null it is neither null
if (dc.beginning != null || dc.text != null || dc.end != null) {
return dc;
}
return null;
}
}
Test it by registering with GsonBuilder():
@Test
public void test() {
DetailUser du = new GsonBuilder()
.registerTypeAdapter(Disconnect.class, new NullAdapter())
.create()
.fromJson(**YOUR_NULL_JSON**, DetailUser.class);
assertNull(du.disconnect);
}
answered Dec 27 at 16:01
pirho
3,716101830
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Your problem is that there is a Disconnect object in your json that has all its fields null. Gson is working as it should but if you want to have Disconnect to be null whenever its all fields are null you have some options.
One option is to create custom JsonDeserializer, like:
public class NullAdapter implements JsonDeserializer<Disconnect> {
@Override
public Disconnect deserialize(JsonElement json, Type typeOfT,
JsonDeserializationContext context)
throws JsonParseException {
Disconnect dc = new Gson().fromJson(json, typeOfT);
// Here you decide the criteria in which case to return the Disconnect or null
// I decided that if any of its fields is not null it is neither null
if (dc.beginning != null || dc.text != null || dc.end != null) {
return dc;
}
return null;
}
}
Test it by registering with GsonBuilder():
@Test
public void test() {
DetailUser du = new GsonBuilder()
.registerTypeAdapter(Disconnect.class, new NullAdapter())
.create()
.fromJson(**YOUR_NULL_JSON**, DetailUser.class);
assertNull(du.disconnect);
}
answered Dec 27 at 16:01
pirho
3,716101830
add a comment |
Your problem is that there is a Disconnect object in your json that has all its fields null. Gson is working as it should but if you want to have Disconnect to be null whenever its all fields are null you have some options.
One option is to create custom JsonDeserializer, like:
public class NullAdapter implements JsonDeserializer<Disconnect> {
@Override
public Disconnect deserialize(JsonElement json, Type typeOfT,
JsonDeserializationContext context)
throws JsonParseException {
Disconnect dc = new Gson().fromJson(json, typeOfT);
// Here you decide the criteria in which case to return the Disconnect or null
// I decided that if any of its fields is not null it is neither null
if (dc.beginning != null || dc.text != null || dc.end != null) {
return dc;
}
return null;
}
}
Test it by registering with GsonBuilder():
@Test
public void test() {
DetailUser du = new GsonBuilder()
.registerTypeAdapter(Disconnect.class, new NullAdapter())
.create()
.fromJson(**YOUR_NULL_JSON**, DetailUser.class);
assertNull(du.disconnect);
}
answered Dec 27 at 16:01
pirho
3,716101830
add a comment |
Your problem is that there is a Disconnect object in your json that has all its fields null. Gson is working as it should but if you want to have Disconnect to be null whenever its all fields are null you have some options.
One option is to create custom JsonDeserializer, like:
public class NullAdapter implements JsonDeserializer<Disconnect> {
@Override
public Disconnect deserialize(JsonElement json, Type typeOfT,
JsonDeserializationContext context)
throws JsonParseException {
Disconnect dc = new Gson().fromJson(json, typeOfT);
// Here you decide the criteria in which case to return the Disconnect or null
// I decided that if any of its fields is not null it is neither null
if (dc.beginning != null || dc.text != null || dc.end != null) {
return dc;
}
return null;
}
}
Test it by registering with GsonBuilder():
@Test
public void test() {
DetailUser du = new GsonBuilder()
.registerTypeAdapter(Disconnect.class, new NullAdapter())
.create()
.fromJson(**YOUR_NULL_JSON**, DetailUser.class);
assertNull(du.disconnect);
}
answered Dec 27 at 16:01
pirho
3,716101830
Your problem is that there is a Disconnect object in your json that has all its fields null. Gson is working as it should but if you want to have Disconnect to be null whenever its all fields are null you have some options.
One option is to create custom JsonDeserializer, like:
public class NullAdapter implements JsonDeserializer<Disconnect> {
@Override
public Disconnect deserialize(JsonElement json, Type typeOfT,
JsonDeserializationContext context)
throws JsonParseException {
Disconnect dc = new Gson().fromJson(json, typeOfT);
// Here you decide the criteria in which case to return the Disconnect or null
// I decided that if any of its fields is not null it is neither null
if (dc.beginning != null || dc.text != null || dc.end != null) {
return dc;
}
return null;
}
}
Test it by registering with GsonBuilder():
@Test
public void test() {
DetailUser du = new GsonBuilder()
.registerTypeAdapter(Disconnect.class, new NullAdapter())
.create()
.fromJson(**YOUR_NULL_JSON**, DetailUser.class);
assertNull(du.disconnect);
}
answered Dec 27 at 16:01
pirho
3,716101830
answered Dec 27 at 16:01
pirho
3,716101830
answered Dec 27 at 16:01
pirho
3,716101830
answered Dec 27 at 16:01
pirho
3,716101830
3,716101830
add a comment |
add a comment |
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